Flow dynamics of gas-solid fluidized beds with evaporative liquid injection--颗粒学报PARTICUOLOGY

Du, B., Warsito, W., & Fan, L.-S. (2006). Flow dynamics of gas-solid fluidized beds with evaporative liquid injection. China Particuology, 4(1), 1–8. https://doi.org/10.1016/S1672-2515(07)60224-3

Flow dynamics of gas-solid fluidized beds with evaporative liquid injection

Bing Du ^a, W. Warsito ^a, Liang-Shih Fan ^a *

a Department of Chemical and Biomolecular Engineering, The Ohio State University, 140 West 19th Avenue, Columbus OH 43210, USA

10.1016/S1672-2515(07)60224-3

Volume 4, Issue 1, February 2006, Pages 1-8

Received 10 October 2005, Accepted 21 December 2005, Available online 14 December 2007.

E-mail: fan.1@osu.edu

Highlights

Abstract

The electrical capacitance tomography (ECT) with neural network multi-criteria image reconstruction technique (NN-MOIRT) is developed for real time imaging of a gas-solid fluidized bed using FCC particles with evaporative liquid injection. Some aspects of the fundamental characteristics of the gas-solid flow with evaporative liquid injection, including real time and time averaged cross-sectional solids concentration distributions, the cross-sectional solids concentration fluctuations and the quasi-3D flow structures are studied. A two-region model and a direct image calculation are proposed to describe the dynamic behavior in both the bubble/void phase and the emulsion phase based on the tomographic images. Comparisons are made between the fundamental behaviors of the gas-solid flows with and without evaporative liquid injection for various gas velocities ranging from bubbling to turbulent fluidization regimes. Significant differences are observed in the behavior of the gas-solid flow with the evaporative liquid injection compared to the fluidized bed without liquid injection.

Graphical abstract

Keywords

gas-solid fluidized bed; evaporative liquid injection; electrical capacitance tomography; real time imaging

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